kernel/fs/ufs/ufs_log.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/systm.h>
  30 #include <sys/vnode.h>
  31 #include <sys/uio.h>
  32 #include <sys/errno.h>
  33 #include <sys/fs/ufs_inode.h>
  34
  35 #include <sys/fs/ufs_filio.h>
  36 #include <sys/fs/ufs_log.h>
  37 #include <sys/sunddi.h>
  38 #include <sys/file.h>
  39
  40 /* ARGSUSED */
  41 int
  42 ufs_fiologenable(vnode_t *vp, fiolog_t *ufl, cred_t *cr, int flags)
  43 {
  44         int             error = 0;
  45         fiolog_t        fl;
  46
  47         /*
  48          * Enable logging
  49          */
  50         if (ddi_copyin(ufl, &fl, sizeof (fl), flags))
  51                 return (EFAULT);
  52         error = lufs_enable(vp, &fl, cr);
  53         if (ddi_copyout(&fl, ufl, sizeof (*ufl), flags))
  54                 return (EFAULT);
  55
  56         return (error);
  57 }
  58
  59 /* ARGSUSED */
  60 int
  61 ufs_fiologdisable(vnode_t *vp, fiolog_t *ufl, cred_t *cr, int flags)
  62 {
  63         int             error = 0;
  64         struct fiolog   fl;
  65
  66         /*
  67          * Disable logging
  68          */
  69         if (ddi_copyin(ufl, &fl, sizeof (fl), flags))
  70                 return (EFAULT);
  71         error = lufs_disable(vp, &fl);
  72         if (ddi_copyout(&fl, ufl, sizeof (*ufl), flags))
  73                 return (EFAULT);
  74
  75         return (error);
  76 }
  77
  78 /*
  79  * ufs_fioislog
  80  *      Return true if log is present and active; otherwise false
  81  */
  82 /* ARGSUSED */
  83 int
  84 ufs_fioislog(vnode_t *vp, uint32_t *islog, cred_t *cr, int flags)
  85 {
  86         ufsvfs_t        *ufsvfsp        = VTOI(vp)->i_ufsvfs;
  87         int             active;
  88
  89         active = (ufsvfsp && ufsvfsp->vfs_log);
  90         if (flags & FKIOCTL)
  91                 *islog = active;
  92         else if (suword32(islog, active))
  93                 return (EFAULT);
  94         return (0);
  95 }